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Post by batrepo on Jul 8, 2017 19:12:50 GMT -6
Hi people. Got an issue and looking for help. I have a 2005 Sea Pro SV1900cc with a 2004 Yamaha 115 2 stroke powering it. Motor has been running like a champ up until today. I was at full throttle today on relatively calm water when I hit another boaters wake hard and instantly motor acted like it was going to die and bogged way down. Motor was unable to take any throttle afterwards but would idle fine and run just in forward but once I tried giving more throttle it would big down again. I pulled hood off and found a plug of sorts, on the right side looking from the back towards front of boat,that had been unplugged or came unplugged. Upon plugging back in an alarm sounds. Not sure if it came unplugged as a result of the boat slamming down on the wake of if it was already unplugged. Any ideas? It didn't change any throttle issue once plugged back in and idled fine when unplugged or plugged. There is plenty of oil in main tank and reserve tank on motor. Help please- there are fish to be caught tonight.
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Post by gnrphil on Jul 8, 2017 19:27:41 GMT -6
My first thought would be to check to see if a fuel line became kinked, make sure you're getting good fuel flow. I had a similar issue one time and it turned out to be the anti siphon valve.
Another possibility would be a float in one of the carbs got stuck.
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Post by batrepo on Jul 8, 2017 19:42:21 GMT -6
My first thought would be to check to see if a fuel line became kinked, make sure you're getting good fuel flow. I had a similar issue one time and it turned out to be the anti siphon valve. Another possibility would be a float in one of the carbs got stuck. I'll check the lines and see if that's the case. The boat came down pretty hard and instantly bogged down. Never seen anything like it. |
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Post by gnrphil on Jul 8, 2017 19:47:55 GMT -6
Good luck, wish I could help more but that's all I've got for now.  Aboard. |
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Post by Juan on Jul 9, 2017 4:43:53 GMT -6
I tend to agree with gnrphil's suggestion and would check the fuel bulb to see if it's holding and is still firm when pumped up first, A picture of the plug you found unplugged would help a lot. How long have you owned the boat? There's the possibility that the previous owner unplugged an alarm sensor.
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Post by freezerfiller on Jul 9, 2017 8:49:28 GMT -6
Yeah, it does sound like fuel starvation, but the timing does seem odd. If you're bulb pumps tight and it's still doing it, I wonder if the engine has to be off for a certain time for the alarm to reset? maybe plug in the wire and leave it off for a few minutes and try again? Does it rev up ok in Neutral? It's possible that the jolt knocked some crud loose and clogged up a high speed jet.
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Post by batrepo on Jul 9, 2017 11:38:52 GMT -6
I haven't had a chance to get it back out on the lake yet but I did check the bulb last night. It doesn't stay firm long and when pumping it you can hear air or some other similar noise in the bilge area. I didn't find any kinked lines and everything looks normal. I've had the boat for about 6 months and have had the cover off the motor many times and never saw/noticed the connection being unplugged. I'll post a pic of it later. Thinking about replacing bulb and lines along with anti siphon valve and pickup line.
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Post by Juan on Jul 10, 2017 8:46:20 GMT -6
The fuel bulb should stay firm and there shouldn't be a hissing noise in the bilge so you very well might have a fuel line leak. Changing the bulb and line should resolve that and is probably a good thing to do just as routine maintenance if it's very old. BUT, I can't imagine how you could have developed a fuel leak from hitting another boat's wake... maybe possible if there is enough slack in the line to give it a hard jolt or slam it against something that would cause the leak. I'd still look closely at the disconnected plug. Does your 115 have an oil tank under the cowling? If so, there is probably an oil level sensor attached to that cap that may have jolted loose?
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985crabs
Captain
2000 V1900 Bay Series, Yamaha 150 Carb. 2
Posts: 1,309
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Post by 985crabs on Jul 10, 2017 8:53:16 GMT -6
Can you smell raw fuel in the bilge? Keep it vented!
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Post by freezerfiller on Jul 10, 2017 15:42:14 GMT -6
I'd start with a new bulb, if it still wont stay firm, you are pumping air or pushing gas past the carb. The hissing in the bilge seems odd, maybe the fuel vent unless you have a leaking fuel line on the suction side of the bulb. That would certainly cause the problem you describe and wouldn't neccesarily show as a fuel leak. I've had a pinhole air leak that would not draw enough air at idle to show up, but when you start sucking fuel (like running or pumping the bulb) it would draw more air than fuel.
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